Company Registry Lookup APIs
Company registry APIs read from official business registers, so results reflect legal filings rather than scraped profiles. Companies House is the UK's own registry API, and CNPJ.WIKI and ReceitaWS look up Brazilian companies by CNPJ without a key. OpenCorporates and OpenRegistry span many countries' registers, OpenMercantil covers Spain's BORME, and GlobalEntity adds VAT and LEI checks across 56 registers.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
CNPJ AbertoSearches 70M+ Brazilian companies by CNPJ, name, or partners, from monthly federal registry data. Business & Productivity › Company Data | Freemium | API key | JSON | 100–1k/day | Live |
CNPJ.WIKILooks up Brazilian companies by CNPJ using official Receita Federal registry data, no key. Data & Knowledge › Open Government Data | Free | None | JSON | 10k+/day | Live |
Companies HouseUK company registry lookups: officers, filings, addresses and status for registered companies. Data & Knowledge › Open Government Data | API key | JSON | — | Live | |
GlobalEntityNormalized company lookup, VAT/LEI checks, and ownership data from 56 national business registers. Business & Productivity › Company Data | Free trial | API key | JSON | — | Live |
Katalis UK Company EnrichmentVerified UK company profiles: Companies House facts, an AI summary and accuracy score, by name or domain. Business & Productivity › Company Data | Freemium | API key | JSON | <100/day | Live |
KontragentProRussian company lookup by INN: registration details, 5-year financials, court/bankruptcy risk, AI scoring. Business & Productivity › Company Data | Freemium | API key | JSON | 100–1k/day | Live |
OpenCorporatesCompany registry data (officers, filings, addresses) sourced from official registers in many countries. Data & Knowledge › Open Government Data | Freemium | API key | JSON | <100/day | Live |
OpenMercantilSearch Spanish company registry (BORME) filings, corporate profiles and officer data. Data & Knowledge › Open Government Data | Freemium | None | JSON | 100–1k/day | Live |
OpenRegistryLive queries across 37 national company registries: profiles, officers, shareholders, and filings. Business & Productivity › Company Data | Freemium | OAuth | JSON | 10k+/day | Live |
ReceitaWSBrazilian company registry lookup by CNPJ: legal status, address, activities and Simples Nacional data. Business & Productivity › Company Data | Freemium | None | JSON | — | Live |
RegistrumEnriched UK company data — profiles, directors, PSC, parsed iXBRL financials — built on Companies House. Business & Productivity › Company Data | Freemium | API key | JSON | <100/day | Live |
CNPJ AbertoFreemiumLive
Searches 70M+ Brazilian companies by CNPJ, name, or partners, from monthly federal registry data.
API key · JSON
100–1k/day
llms.txt
CNPJ.WIKIFreeLive
Looks up Brazilian companies by CNPJ using official Receita Federal registry data, no key.
None · JSON
10k+/day
llms.txt
Companies HouseLive
UK company registry lookups: officers, filings, addresses and status for registered companies.
API key · JSON
—
OpenAPI spec
GlobalEntityFree trialLive
Normalized company lookup, VAT/LEI checks, and ownership data from 56 national business registers.
API key · JSON
—
llms.txt
Katalis UK Company EnrichmentFreemiumLive
Verified UK company profiles: Companies House facts, an AI summary and accuracy score, by name or domain.
API key · JSON
<100/day
OpenAPI spec
KontragentProFreemiumLive
Russian company lookup by INN: registration details, 5-year financials, court/bankruptcy risk, AI scoring.
API key · JSON
100–1k/day
OpenAPI spec · llms.txt
OpenCorporatesFreemiumLive
Company registry data (officers, filings, addresses) sourced from official registers in many countries.
API key · JSON
<100/day
no machine-readable spec
OpenMercantilFreemiumLive
Search Spanish company registry (BORME) filings, corporate profiles and officer data.
None · JSON
100–1k/day
OpenAPI spec · llms.txt
OpenRegistryFreemiumLive
Live queries across 37 national company registries: profiles, officers, shareholders, and filings.
OAuth · JSON
10k+/day
llms.txt
ReceitaWSFreemiumLive
Brazilian company registry lookup by CNPJ: legal status, address, activities and Simples Nacional data.
None · JSON
—
no machine-readable spec
RegistrumFreemiumLive
Enriched UK company data — profiles, directors, PSC, parsed iXBRL financials — built on Companies House.
API key · JSON
<100/day
OpenAPI spec
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Choosing a Company Registry Lookup API
Is there a free Company Registry Lookup API?
Yes. CNPJ.WIKI is free to use, and OpenCorporates, CNPJ Aberto, Katalis UK Company Enrichment, KontragentPro, OpenMercantil and 3 others have a free tier alongside paid plans.
Which Company Registry Lookup APIs work without an API key?
CNPJ.WIKI, OpenMercantil and ReceitaWS need no key or sign-up, so you can try them with a plain request.
Can I call a Company Registry Lookup API from front-end JavaScript?
CNPJ.WIKI and OpenMercantil allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.
Can I use Company Registry Lookup APIs in a commercial project?
CNPJ Aberto, GlobalEntity, Katalis UK Company Enrichment, KontragentPro, OpenMercantil and 1 other permit commercial use. OpenCorporates, CNPJ.WIKI and Registrum restrict it, for example to non-commercial or attributed use, so read the terms first.
Which Company Registry Lookup APIs work with AI agents?
Companies House, Katalis UK Company Enrichment, KontragentPro, OpenMercantil and Registrum publish an OpenAPI spec for generating clients and tools.
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